batch lookup given a list of wnid (wordnet id) on stdin

wnidlookup.py

#!/usr/bin/python

import argparse, fileinput, re
from nltk.corpus import wordnet as wn

parser = argparse.ArgumentParser(
    description='read from stdin one wnid per line, output the name and definition of each wnid by looking up in synset',
    formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-t', '--separator', type=str,
    default=',', help='field separator character')
parser.add_argument('-r', '--replacement', type=str,
    default='', help='replacement string for the separator character occuring in definition')
args = parser.parse_args()
sep = args.separator

for line in fileinput.input():
    x = re.search(r'^\s*n(\d+)', line)
    if (x):
        wnid = x.group(0)
        pos = int(x.group(1))
        w = wn._synset_from_pos_and_offset('n', pos)
        lm = '/'.join([str(lemma.name()) for lemma in wn.synset(w.name()).lemmas()])
        dfn = w.definition().replace(sep, args.replacement)
        print(sep.join([wnid, lm, dfn]))